LC87F7932B Datasheet, PDF (13/29 Pages) Sanyo Semicon Device – 32K-byte FROM and 2048-byte RAM integrated 8-bit 1-chip Microcontroller

LC87F7932B
User Option Table
Option name
Port output type
Option to be applied
on
P00 to P07
Mask version
*1
P10 to P17
P30
Basetimer
watchdog timer
Watchdog
period
timer
Flash-ROM
version
{
{
{
Option Selected in units of
1 bit
1 bit
1 bit
{
-
Program start
address
-
*2
{
-
*1: Mask option selection-No change possible after mask is completed.
*2: Program start address of the mask version is 00000h.
Option selction
CMOS
Nch-open drain
CMOS
Nch-open drain
CMOS
Nch-open drain
1s
2s
4s
8s
00000h
07E00h
*Note 1: Connect as follows to reduce noise on VDD.
VSS1 and VSS2 must be connected together and grounded.
*Note 2: The power supply for the internal memory is V2. VDD1, VDD2 and V2 are used as the power supply for ports.
When VDD1 and VDD2 are not backed up, the port level does not become “H” even if the port latch is in the
“H” level. Therefore, when VDD1 and VDD2 are not backed up and the port latch is “H” level, the port level
is unstable in the HOLD mode, and the back up time becomes shorter because the through current runs from
VDD to GND in the input buffer.
If VDD1 and VDD2 are not backed up, output “L” by the program or pull the port to “L” by the external
circuit in the HOLD mode so that the port level becomes “L” level and unnecessary current consumption is
prevented.
Power
supply
Back up capacitors
LSI
VDD1
VDD2
V1
V2
V3
VDC
CUP1
CUP2
VSS1 VSS2
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